215312233 has 2 divisors, whose sum is σ = 215312234. Its totient is φ = 215312232.

The previous prime is 215312231. The next prime is 215312261. The reversal of 215312233 is 332213512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164788569 + 50523664 = 12837^2 + 7108^2 .

It is a cyclic number.

It is not a de Polignac number, because 215312233 - 2¹ = 215312231 is a prime.

Together with 215312231, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (215312231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107656116 + 107656117.

It is an arithmetic number, because the mean of its divisors is an integer number (107656117).

Almost surely, 2^215312233 is an apocalyptic number.

It is an amenable number.

215312233 is a deficient number, since it is larger than the sum of its proper divisors (1).

215312233 is an equidigital number, since it uses as much as digits as its factorization.

215312233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 22.

The square root of 215312233 is about 14673.5214928115. The cubic root of 215312233 is about 599.3625016033.

Adding to 215312233 its reverse (332213512), we get a palindrome (547525745).

The spelling of 215312233 in words is "two hundred fifteen million, three hundred twelve thousand, two hundred thirty-three".